Pump.



O. B. DALZELL.

PUMP.

APPLIOATION FILED JUNE 30, 1913.

1, 1 25,483, Batented Jan. 19, 1915.

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PUMP.

APPLICATION FILED JUNE 30, I913.

Patented Jan. 19, 1915.

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G. B. DALZELL.

PUMP.

APPLICATION FILED JUNE so, 1913.

1,125,483, Patented Jan.19,1915.

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CHARLES BR-OWN DALZELL, OF LITTLE FALLS, NEW YORK, ASSIGNQR 'IO D. H.BUB- RELL & COMPANY, OF LITTLE FALLS, NEW YORK.

PURE.

Application filed June 30, 1913.

To aZZ whom it may concern Be it known that I, CHARLES BRowN DAL- ZELL,a citizen of the United States, residing at Little Falls, in the countyof Herkimer and State of New York, have invented a new anduseful'lmprovement in Pumps, of which the following is a specification.

This invention relates to a mechanically driven pump in whichthe pistonhas both a reciprocating and partial rotary movement and is soconstructed that it acts as a valve as well as a piston. Pumps of thischaracter are commonly known as valveless pumps and are particularlysuitable for handling milk or other liquids of such na ture as to renderit necessary or desirable to frequently clean the pump. Owing to thefact that there are no valves, the pump may be very readily taken apartand thoroughly cleansed.

The objects of this invention are to provide an improved and simplifiedcylinder construction for a pump of this nature in which one cylinderhead is made integral with the body of the cylinder, to provide animproved mechanism for imparting the necessary reciprocating and rotarymove ments to the piston, to provide improved lubrication for, andsimplifythe construction of the driving means for the piston, andotherwise to improve the general construc tion of the pump, as willappear from the following detailed description.

In the accompanying drawings: Figure l is a side elevation of a pumpembodying one form of the invention. Fig. 2 is a view similar to Fig. 1,the driving pulleys being omitted and the cylinder removed, Fig. 3 is aside elevation of the cylinder detached from the pump. Fig. 4: is atransverse vertical section through the driving end of the pump taken online H of Fig. 1. Fig. 5 is a. vertical longitudinal section taken onmatic view illustrating the movements of the angular crank pin and crankpin slide. Fig. 7 is a fragmentarytransverse vertical sectional viewthrough .the driving end of the pump, showing the crank shaft rotatedthrough 180 from the position indicated in Fig. el. Fig. 8 is asectional plan view. Fig. 9 is a fragmentary vertical sectionalSpecification of Letters Patent.

Patented Jan. 119, 11215.

Serial No. 778,50t.

view of a portion of the frame, crank shaft bearing and crank, showingthe crankshaft bearing inverted prior to removal. Fig. 10 is a sectionon line 10-1O of Fig. 4. Fig. 11 is a section on line 1lll of Fig. 9.Figs. 12 and 13 are vertical central transverse sectional views throughthe cylinder and piston, showing twoangular positions of the piston.Fig. 14: is a cross section through El e hub of the tight pulley on line1414:,

Like reference characters refer to like parts in the several figures.

1 designates the frame of the pump which has a bracket 2 at one endthereof. One head, 3, of the pump cylinder is secured to this bracket inany suitable manner as by means of the screws 4. H

5 is the pump cylinder which hasa head 6 preferably formed integrallytherewith. The cylinder 5 is removably held against the head 3 in anysuitable manner, preferably by means of the bail 7 pivoted to the frame1 by the pivots 8 and carrying a screw 9 provided with a hand wheel 10by which pressure may be put upon the cylinder to force the same intoengagement with the head 3. The joint between the cylinder and the head3 may be packed in any suitable manner, as by providing a packing 11 ina. groove in the end of the cylinder which is adapted to engage a rib 12formed on the head 3. The head 3 is also preferably pro vided with anannular flange 13 adapted to receive the end of the cylinder. Thecylinder is provided with ports 14 and 15. As shown, the lower port 14is the intake port, while the upper port 15 is the discharge port. Theintake and discharge pipes may be connected to these ports by anysuitable detachable connectors so that they may be disconnected topermit the ready removal of the cylinder for cleaning.

16 is the pump piston, which is mounted particularly to Figs. 5, 8, 12and 13, it will be seen that the operation of this piston is briefly asfollows: The piston being in the position indicated in Fig. 12, is movedaway from the cylinder head 6 (and toward the eye), which causes theliquid to be pumped.

to be drawn into the recess 21 in the piston and into the end of thecylinder adjacent to the head 6, which is in connection with said recess21, so as to fill the 'recess and the,

space between the end of the piston and-the cylinder head 6. At the sametime, supposing the end of the cylinder between the piston and the head3 and the recess 19 to have been filled with liquid by a previousopera-' tion of the piston, this liquid will be forced out through theport 15 by the movement of the piston toward the head 3. As the pistonpiston eventually occupies the position.

.sho'wn in Fig. 13. In this position it will be seen that as the pistonis moving toward the head 6 (and away from the eye) the liquid drawninto the endvof the cylinder adjacent to the head 6 and filling that endof the cylinder and the recesses 21-and 22,

will be forced out through the recess 22 and port 15 at the same timemilk will be drawn nto the recess 20 through the port 14 to fill tionand may be taken apart with the greatsaid recess, the end of thecylinder adjacent to the head 3 and the recess 19. On the 'next strokethe milk will be again forced out through the recess 19 and port 15 anddrawn in through the port 14 and recess 21, and so' on. This pump isdouble acting and no valves whatever are required other than the pistonitself and the ports in the cylinder.

It will be seen, that the cylinder'and piston described, which are theonly parts with which the liquid to be pumped comes in contact,- are ofextreme simplicity ofconstrucest ease for the purpose of'cleaning andsterilization.

For giving to the piston the described re.- ciprocating and rotarymovements, suitable mechanism is provided which is preferabl constructedas follows: The piston rod 1 is secured to a cross head 23 which isguided in a suitable guide in the main frame of the pump in such a wayas to be capable of reciprocating and-limited rotary movement. As shown,the cross 'hcad'23' is cylindrical v and slides in a cylindricalguide-way 24 in the main frame. The piston rod 17 may be secured to thecross head in any suitable manner, as by'being fitted in a socket 25therein in which it is secured by means of a plurality of set screws 26engaging the endof the piston rod at different angles.

The cross head 23 has a transverse cylindrical bearing recess 27 inwhich is mounted a cylindrical crank pin slide 28. -The latter iscapable of'reciprocating and rotary movement in the recess 27 and isprovided with a transverse bearing recess 29. The bearing recess 29receives the angularly disposed end or crank pin 30 of a crank shaft 31,which rotates about an axis at right angles to theaxis of the piston rod17. Rotation of the crank shaft will cause a gyr'ation of the crank pin30 which will result in transmitting to the cross head 23, piston rodand piston the desired reciprocating and partial rotary movements. Thisgyratory movement of the crank pin is'indicated in Fig. 6, which showsfour positions of the crank pin and the corresponding positions of thecrank pin slide 28 in dotted lines.

By reason of the described construction of cross head and crank pinslide, itis possible' to make the bearing surfaces ofthe working partsof large area so as to withstand the stresses caused by the angularrotating crank 'pin, .which stresses are constantly varying in directionand amount.

Any suitable arrangement for lubricating these surfaces may be providedbut this lubrication is efiectually accomplished by the structure shown.As illustrated, the cylindrical guide-way for the cross head 23 forms achamber, one end wall '32 of which is preferably formed integral withthe frame of the pump, while the other end Fig. 7, it dips into the oiland forces the same throu h the oil channels 35 in the slide, thus toroughly lubricating the bearings between the crank pin and slide andbetween the slide and cross head. The cylindrical bearing for the crosshead is recessed as is indicated at '36, to'provide clearance for thecrank pin slide in its extreme positions. If the oil level inthe-chamber 36 should drop so low that the'oil cannot overflow into therecess 39 'the crank pin slide on its. downward stroke will force oilover from the chamber 36 into the recess 39 and keep the latter suppliedwith oil.

The crank shaft 31 may be supported in' any suitable manner but in theconstruction 1 preferably employed, this shaft is mounted masses in theframe in any suitable manner, as by means of the screws 40, as shown indotted lines in Figs. 4 and 8, whichpass through a flange 41 on thebearing sleeve and into the end of the tubular supporting portion of theframe. The sleeve is provided with a chamber 42 having an open bottom 43through which depends an oil ring 44 riding upon a portion 45 of thecrank shaft of reduced diameter. The shaft is tapered at each'side ofits reduced portion, as indicated at 46, so as to carry the .oildeposited upon the shaft by the ring 44 to the shaft journals. The oilcarried along the shaft toward the crank pin is discharged into the mainchamber in which the cross head reciprocates, while the oil carriedalong this shaft in the opposite direction is stopped by a groove 47formed in the shaft and collected in a small chamber 48 from which it isconducted back to the recess 39 through a duct 49. in this way acontinuous circulation of oil is provided. The level of the oil 84 inthe guide chamber for the cross head is preferably higher than thedividing wall between this chamber and the oil recess 39 so that the oilmay flow from one chamber to the other as required. In order that thecrank shaft hearing may be removed from its recess in the frame withoutinterference from the oil ring 44, the bearing is so constructed thatwhen inverted it will lift the oil ring to a concentric position so asto permit the ring to move out through the opening in the end of theframe with the shaft bearing. Figs. 4 and 10 show the bearing in itsnormal position with the oil ring 44 depending into therecess 39 throughthe open bottom 43 of the chamber 42. Figs. 9 and 1] show the bearinginverted, the oil, ring 44 being supported by the top of the chamber 42and held in concentric position so that it will not interfere with theWithdrawal of the crank shaft bearing. in order to make sure that thebearing is properly inverted before being withdrawn, any suitableindicating or interlocking device may be provided. As shown, the flange41 of the hearing has a notch 50 which is adapt ed to register with ahook or lug 51 secured to the frame when the bearing is in position tobe removed. When the bearing has been inverted so as to permit the oilring to depend through the open bottom of the chamber 42, the notch 50is moved away from the hook 51 and the latter overhangs the periphery ofthe flange 41 so that re moval of the bearing is impossible.

The crank shaft is prevented from longitudinal movement in its bearingin any suitable manner. It is preferably provided at its inner end witha collar 52 engaging the inner end of the bearing, while on its outerend are mounted means for imparting motion to it from any suitablesource of power,

such as the tight and loose pulleys 53 and.

533 respectively. The tight pulley 53 engages the outer end of the shaftbearing and so prevents movement of the shaft 1n the inward direction.The pulleys may be held upon the shaft by any suitable means. As shownin Fig. 14, the hub of the tight pulley 53 is split and clamped upon theshaft by a screw bolt 54 and the pulley is interlocked with the shaft bya key 55. A removable collar 56 is secured upon the end of the shaft. Byadjusting the tight pulley longitudinally on the shaft, any endwise playof the latter may be taken up. Obviously the shaft may be driven in anyother desired manner.

Suitable drainage cocks may be provided, such as 57, for draining theoil from the guide chamber for the cross head, and '58, for draining oilor milk which may accidentally collect in the space between the crosshead, guidechamber and the pump cylinder.

From the foregoing description it will be seen that a pump is providedwhich is of simple construction and can be very easily taken apart forcleaning and in which the working parts have large bearing surfacesthoroughly lubricated so that great durability is secured. lhe drivingmechanism for the pump is of great simplicity and gives the necessaryreciprocating and rotary movements to the pump piston. It isparticularly well adapted to drive the piston at a comparatively highspeed and with a short stroke, which results in the smooth and steadyoperation of the pump and uniform flow of the liquid. A short stroke isalso particularly desirable as it permits the cyl inder and one head tobe readily formed as an integral structure and facilitates the removaland cleaning of the interior of the cylinder. The short stroke resultingin a steady flow through the delivery line sub stantially eliminatesvibration of the latter, which is objectionable particularly when thepump is utilized for circulating the liquid through tubular pasteurizersor other likeapparatus.

I cla1m as my lnventionz 1. The combination of a pump frame, a

cylinder mounted on said frame, a guideway on said frame, a pistonmounted in said cylinder, a cross head reciprocably and rotatablymounted in said guide-way, connections between said cross head andpiston, a crank pin slide mounted in said cross head to reciprocate in adirection transverse to the direction of reciprocation of said crosshead, a crankshaft rotatable about an axis transverse to the directionof reciprocation of said cross head, and an angularly disposed crank pincarried by said crank shaft and journaled in a bearing recess in saidcrank pin slide.

2. The combination of a pump frame, a

cylinder mounted on said frame; a pistes reciproca-bly and rotatab'lymounted in saidcylinder, said piston having parts acting as inlet anddischarge valves when the piston is rotated, said frame having acylindrical guide recess therein alined with said cylin-q der, a crosshead reciprocably and rotatably mounted in said recess, connectionsbetween said cross head and piston, said cross head having a cylindricalbearingrecess therein, the axis of which is transverse to the axis ofsaid cylindrical guide recess in the frame,

a cylindrical crank pin slide mounted in said bearing recess, a crankshaft mounted in said frame and rotatable about an axis 3. Thecombination of a support having a guideway, a cross head mounted 111said guideway and capable of recinr'ocatory and limited rotary movement,said cross headhaving a cylindrical bearing recess, a cylindrical crankpin slide mounted in said bearing recess and having limited rotary move---ment and reciprocatory movement in a 'direction at right angles to thedirection of the reciprocatory movement ofsald crosshead, said crank pinslide having a bearingrecess whose axis is perpendicular to the axis ofreciprocafory-movement thereof, a crank shaft rotatable about an axisperpe'n dicular to the axis of reciprocatory move ment of said crosshead, and" a crank pin carried by said crank shaft and disposed atanangle to the axis of rotation thereof, said crank pin being retatablymounted in the bearmrecess in said crank pin slide.

4. 'l l ie combination of a frame having'a guideway, a cross headmounted in *said guidevvay to have reciprocatory and limited rotarymovement, a crank pinslide' mounted in said cross head, a crank shafthaving an angularlv disposed crank pin engaging'said slide, and abearing for said crank shaft comprising a sleeve removably mounted in-a' recess in said frame.

5. The combination of a frame having a guidew'ay, a cross head mountedin said guideway to have reciprocatory and limited rotara movement, acrank pin slide mounted in said cross head, a crank shaft having anangularlv disposed crank pin engaging said slide, .a bearing for saidcrank shaft, an oil holding recess-arranged in said frame below saidshaft and bearing, and anoil reservoir arranged in said frame below saidcrank pin and slide.

6. The combination of a frame having a guide Way, a cross head mountedin said guide Way to have reciprocatory and limited rotary movement, acrank pin slide mount ed in sard cross head, acrankshafthavangmergesrecess in said frame, a chamber in said.

sleeve 'and'an oil ring on said shaft within said chamber.

8; The combinationof a frame having a cylindrical chamber thereinforming a guideway and having a tubular supporting portion projectingatone side of said chamber, said tubular portion having a recess, thelower portions of said chamber and recess forming oil reservoirs, across head mounted in said chamber and having reciprocatory and limitedrotary movement, said cross head having a bearing recess, a crankprntshde mounted 1n sald bearmgrecess and capable of limited rotary andreciproca tory movements in said recess, said crank pin slide having atransverse bearing recess, a crank shaft bearing removably mount ed inthe tubular supporting portion of said frame, a chamber formed in saidbearing having an open bottom, a crank shaft journaled in said bearingcarrying an angularly disposed crank pin which is journaled in thebearing recess in said crank pin slide, and an 'oilring mounted on saidcrank shaft in thechamber in said crank shaft bearing. and dependingthrough the open bottom of said chamber-, into the bil reservoir ir saidtubular portion of the frame.

9. Theicombin'ation of a frame having a cylindrical chamber forming aguideway and having a. tubular supporting portion projecting at one sideofsaid chamber, said tubular portion having a'recess, the lowerportionsofsaid chamber and recess'forming oil reservoirs, a cross headmounted in said chamber and having reciprocatory and rotary movementstherein, said cross head having abearing recess, a crank pin slidemounted in said bearing recess and capable of limited rotary andreciprocat-ory movements in said recess, said crank pin slide having atransverse bearing recess, a crank shaft bearing removably mounted inthe tubular supporting portion of said frame, a chamber formed in saidbearing havin an open bottom, a crank shaft journaled in said bearingcarrying an angularly disposed crank pinwhich is journaled in thebearing recess in said'crank pin slide, an oil ring mounted on saidcrank shaft in the chamber in said crank shaft bearing and dependingthrough the open bottom of said chamber said crank shaft bearing beforeits attemptinto the oil reservoir in. said tubular pored removal fromthe frame.

tion of the frame, said crank shaft bearing Witness my hand, this 27thday of June, being rotatable in said tubular portion of 1913.

the frame so as to center said oil ring in the CHARLES BROWN DALZELL.chamber in said bearing to. permit said bear- Witnesses:

ing to be removed from said tubular por- LOOMIS BURRELL,

tion, and means to insure the inversion of W. T. WOLFENDEN.

